Outside Diameter (mm): 178
Gage Diameter (mm): 159
Center Hole Form: THREADED
Length (mm): 118
8R-3931: 177.67mm Outer Diameter Pin Retainer Collet
http://txaparts.com/shop/8r3931-8r-3931-177-67mm-outer-diameter-pin-retainer-collet-6758
http://txaparts.com/web/image/product.template/6758/image_1920?unique=6e91650
Application: 992C, 992D, 994, 994D, 994F, 994H, R1600, R1600G, R1600H, R1700 II, R1700G
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Shipping: 2-3 Business Days