Bone Bow Spacer 19.5 cm - 7-3/4˝

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ManufacturerSince 2007

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Bone Bow Spacer 19.5 cm - 7-3/4˝

The bone bow spacer is a sharp-tipped bow compass for lifting a measurement straight off bone and carrying it to the opposite side, 19.5 cm overall. Surgeons use it in craniofacial and orthognathic surgery where symmetry is the whole point, and the arc screw locks the setting so a bone caliper reading survives being set down mid-case. Bulk discounts apply on multi-piece orders.

Why Surgeons Choose It

Sharp tips bite bone and hold position instead of sliding on periosteum
Arc screw locks the span so the measurement transfers unchanged
19.5 cm arms span the facial skeleton without crowding the field
Smooth pivot opens and closes one-handed in a gloved hand
One-piece forged arms, nothing to loosen or trap debris

Catalog Numbers

Length	Pattern	Catalog No.
19.5 cm - 7-3/4˝	Sharp tips, locking arc	GAI-38.40

Related Calipers and Measuring Instruments

Built for Repeated Use

Forged and ground from AISI 420 martensitic stainless steel, hardened at the tips so they stay sharp and at the pivot so the arms do not develop play. The satin finish cuts glare under operating lights and resists staining. Full autoclave cycles at 134 °C cause no distortion or pitting.

Direct From the Manufacturer

We manufacture this instrument in our own Sialkot workshop and sell straight to surgeons, clinics, hospitals and distributors, so there is no importer margin in the price. Every piece is inspected and the arc screw tested before dispatch, and it carries a one-year warranty against manufacturing defects. Ask for bulk pricing on multi-piece and full-set orders, and for OEM laser marking on volume quantities.

Quick Specifications

Brand	Gulmaher Surgico
Product Type	Bone Bow Spacer
SKU / Model	GAI-38.40
Size / Configuration	19.5 cm - 7-3/4˝; sharp tips; locking arc screw
Weight	0.15 kg
Applications	Craniofacial, orthognathic and maxillofacial surgery; bone measurement and symmetry checks
Material	AISI 420 stainless steel
Grade	Surgical grade, hardened and ground
Finish	Satin
Packing	Single piece in protective sleeve; bulk packing on request
Sterility & Usability	Supplied non-sterile, autoclavable at 134 °C, reusable

Frequently Asked Questions

What is a bone bow spacer used for?
Transferring a measurement from one side of the facial skeleton to the other. You set the span on bone, lock the arc screw, and carry the same distance across to check or reproduce symmetry.

How is it different from a Castroviejo caliper?
Scale. The Castroviejo is a small 20 to 40 mm caliper for fine marking; this is a 19.5 cm bow compass for spanning the facial skeleton.

Do the tips mark the bone?
They are sharp enough to seat without sliding, which is the point. They indent periosteum rather than cut, and they are not intended for scoring cortex.

Does the setting hold once locked?
Yes. The arc screw clamps the arms so the span survives the instrument being put down and picked up again mid-case.

Can the tips be re-pointed?
Yes, by a competent instrument workshop. Keep both tips equal in length, or the transferred measurement shifts.

Is it supplied sterile?
No. It ships clean and non-sterile, ready for your own cleaning and autoclave cycle at 134 °C before first use.

Shipping

In-stock items ship to the USA in 4–5 working days.

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Returns

Unused items in original packaging can be returned within 30 days with a Return Authorization Number (RAN).
Restocking fees apply after 30 days; some items are not returnable.

Warranty

1-year warranty against manufacturing defects. Warranty details →

Tags: Bone Bow Spacer 19.5 cm , Marking and Measuring Instruments , Plastic Surgery Instruments

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