Specification Brand : Replacement Parts Industries RPI BulletPoint : See Notes below for serial numbers this part fits BulletPoint1 : Material: Black ABS BulletPoint2 : Fits 3/16" double flat shaft BulletPoint3 : (See Notes below) BulletPoint4 : Regarding the Midmark M7, 7 & 777 SpeedClave sterilizers,this Knob only f ItemName : Knob for Midmark - Ritter RPK213 ItemPackageDimensions_Height : 46.99 centimeters ItemPackageDimensions_Length : 1.27 centimeters ItemPackageDimensions_Width : 7.62 centimeters ItemTypeKeyword : science-lab-autoclave-accessories Manufacturer : Replacement Parts Industries RPI Material : steel NumberOfItems : 1 PartNumber : RPK213 ProductDescription : FEATURES * Material: Black ABS * Fits 3/16" double flat shaft * (_See NOTES below_) FITS: Time Switch (_See NOTES below_) MODEL(S) THIS PART FITS: 7, Compact II, M7 NOTES: * Regarding the Midmark M7, 7 & 777 SpeedClave sterilizers, this Knob only fits the RPI Time Switch ( RPI Part #RCT048 ). It does not fit the OEM Timer. * REGARDING THE CLAY ADAMS COMPACT II, this Knob fits both the RPI Time Switch ( RPI Part #RCT048) and the OEM Timer. ProductSiteLaunchDate : 2016-04-28T11:05:07.700Z