$28.14
The Optimist deck collar is made of Delrin to create minimal friction between the sleeve and the collar.
The oval inner diameter allows the maximum fore/aft and minimum side play and the tapered inner diameter allows the mast to be raked.
Requires a 57 mm deck hole and has 4 countersunk mounting holes
The EX1210 has a seperate sleeve which is fitted around the mast at deck level and protects the mast from wearing.