The SBP-300HM1 is a PTZ or dome camera mount cap adapter accessory made of aluminum and available in ivory. This accessory uses a 1 1/2" male threads. Item is compatible with the following:  

SCP-3430/3371/3370/3250/3120/2430/2371/2370/2271/2270/2250

SNP-6200/5300/5200/3371/3302