Cast aluminum cover
27 spline, male, 3-7/8" long, for roller bearing tailhousing
27 spline with one omitted spline, low profile head, for Dedenbear/Reid and Powerglide with roller/needle bearing tailhousing. 1.499" diameter, 4-5/8" barrel length. "D"= 5-13/16"
Rapid release, 32 spline, 1480 series, for Turbo 400 and Super T-10 with roller/needle bearing tailhousings. 1.886" diameter. "D"= 6.145"