I got tired of my frogs heads banging on the playfield glass so I found these rubber rod caps at Marcos and they didn't last one leap! I bought these 3/32" collars off eBay : ebay.com link: itm and am happy to say my frogs don't need helmets! I left the old rubber sleeves on to act as a cushion so they won't make a clanking sound, thought I would share with fellow S.S owners.