They're made of soft krayton rubber and have an ultra slim diameter.
Available in these colours: Black, White, Gum, Blue, Orange and clear.
United Bike Co.
If you can spend a few bucks on your bike, get some grips. It will make your entire bike feel like new. United Bike Co have some new grips out and I'm sure one of their new colours will match your set-up. They're slim and soft and come with a United Nylon push bar end. 
After doing a BMX 'zine for ten years (1987 - 1996) FATBMX made it on the internet. The year was 1998. Here to stay.