I have purchased collets for my J penny 65 mm air cooled spindle,
G-Penny 1.5KW ER11 65mm 110vAC Air Cooled Spindle Motor 4pcs Bearings 24000rpm Wood Working Spindle Motor (110, Volts (AC)) - Amazon.com
and when I carve specially pocket it apears to wobble, I believe the collets I have are wrong size, can someone with the same spindle send link to correct collets please, Thanks ahead of time very much
For the G-Penny 1.5KW ER11 spindle motor with a 65mm diameter, you would typically use ER11 collets. These collets are designed to hold tools with shank diameters ranging from 1mm to 7mm, depending on the specific collet size you choose
https://www.aliexpress.us/item/3256804370818378.html?spm=a2g0o.order_list.order_list_main.11.21ef1802DlOT23&gatewayAdapt=glo2usa
I bought those, along with the 8mm one 
works great. Also, when you’re there you may as well buy the collet nuts (Silver balanced ones), better quality then the one that came with my G-Penny 65mm:
https://www.aliexpress.us/item/3256803632689346.html?spm=a2g0o.order_list.order_list_main.5.21ef1802DlOT23&gatewayAdapt=glo2usa
I bought 4 nuts and dedicated them to 1/4, 1/8, 6mm and 8mm collets. Less time consuming, removing those tiny collets from nuts
